What is the difference between the zx4r and ZX-4RR?

Could you please explain to me the key distinctions between the zx4r and ZX-4RR? I'm interested in understanding what sets these two models apart, especially in terms of their performance capabilities, design features, and any other notable differences that might influence my decision to choose one over the other. I'm a motorcycle enthusiast and would appreciate a comprehensive breakdown of their unique attributes.